Great Lakes Fishery Commission History, Program, and Progress by Walter R. Crowe GREAT LAKES FISHERY COMMISSION 1451 Green Road Ann Arbor, Michigan 48105 September 1975 Reprinted May 1978
The Great Lakes Fishery Commission was established by the Convention on Great Lakes Fisheries, between Canada and the United States, ratified on October 11, 1955. It was organized in April, 1956 and assumed its duties as set forth in the Convention on July 1, 1956. The Commission has two major responsibilities: the first, to develop co-ordinated programs of research in the Great Lakes and, on the basis of the findings, recommend measures which will permit the maximum sustained productivity of stocks of fish of common concern; the second, to formulate and implement a program to eradicate or minimize sea lamprey populations in the Great Lakes. The Commission is also required to publish or authorize the publication of scientific or other information obtained in the performance of its duties. COMMISSIONERS Canada United States F. E. J. Fry R. L. Herbst C. J. Kerswill W. Mason Lawrence K. H. Loftus Claude Ver Duin Vacancy Lester P. Voigt SECRETARIAT Carlos M. Fetterolf, Jr..... Executive Secretary Aarne K. Lamsa... Assistant Executive Secretary William J. Maxon..... Chief Administrative Officer Trudy C. Woods.... Administrative Assistant
History, Program, and Progress
History, Program, and Progress THE NEED for cooperation between the United States and Canada in the solution of problems confronting the fisheries of the Great Lakes has been recognized for many years, Over the past century, several attempts to negotiate a fishery treaty have been made; in 1946 the two countries signed such a treaty, but it was not ratified because of opposition to a provision that would have vested regulatory powers in an international commission. Renewed interest in the development of an acceptable treaty was stimulated by the invasion of the upper Great Lakes by the parasitic sea lamprey. This marine invader reached New York s Finger Lakes and Lake Ontario many years ago. The completion of the Welland Canal, in 1829, enabled the sea lamprey to bypass Niagara Falls. Its presence in Lake Erie was recorded in 1921; by the mid 1930 s the animal had reached Lakes Huron and Michigan; and by the 1940 s it was firmly established in Lake Superior. Its entry into these upper Great Lakes was disastrous. During a series of meetings in 1952-54, delegates drafted a new Convention on Great Lakes Fisheries between the United States of America and Canada (Contracting Parties), which was signed by representatives of the two countries at Washington, D.C., on September 10, 1954. Instruments of ratification were exchanged at Ottawa, Ontario, Canada on October 11, 1955, on which date the Convention became effective. The Convention defined the geographic area of concern 1, provided for the establishment of a joint commission to be 1 Lake Ontario (including the St. Lawrence River from Lake Ontario to the forty-fifth parallel of latitude), Lake Erie, Lake Huron (including Lake St. Clair), Lake Michigan, Lake Superior, and their connecting waters, hereinafter referred to as the Convention Area.
Figure 1. The lake trout (Salvelinus namaycush) Table 1. Summary of requests, allotments, and, expenditures, Great Lakes Fishery Commission, 1958-75 (U. S. Dollars). Fiscal Year Request 1958 $1,417,197 $914,300 1959 1,464,749 919,000 1960 1,541,700 946,300 Expenditures Allotments Adminis- Sea lamprey U.S. Canada Total tration control Total $424,500 $1,338,800 $43,400 $1,288,800 $1,332,200 426,400 1,345,400 43,900 1,295,300 1,339,200 438,900 1,385,200 35,800 1,335,200 1,370,500 1961 1,427,200 967,300 437,800 1,405,100 38,200 1,357,500 1,395,700 1962 1,414,500 967,300 447,200 1,414,500 39,900 1,366,000 1,405,900 1963 1,413,400 919,000 425,200 1,344,200 40,800 1,299,600 1,340,400 1964 1,542,200 1,030,700 475,500 1,506,200 41,600 1,458,400 1,500,000 1965 1,673,100 1,030,700 476,600 1,507,300 44,000 1,454,900 1,498,900 1966 1,616,600 1,056,000 488,300 1,544,300 50,600 1,489,100 1,539,700 1967 1,660,300 1,057,000 490,000 1,547,000 57,300 1,488,300 1,545,600 1968 1,841,700 1,001,800 465,600 1,467,400 56,300 1,411,100 1,467,400 1969 1,879,100 1,158,300 502,100 1,660,400 60,000 1,600,400 1,660,400 1970 1,898,100 1,330,600 617,000 1,947,600 68,600 1,879,000 1,947,600 1971 2,540,500 1,388,000 642,400 2,030,400 68,100 1,962,300 2,030,400 1972 2,612,900 1,827,000 835,700 2,662,700 76,900 2,585,800 2,662,700 1973 2,706,600 1,900,100 1974 3,346,320 1,972,000 19751 3,732,550 2,242,000 874,600 2,774,700 84,700 2,690,000 2,774,700 913,900 2,886,000 101,500 2,784,400 2,886,000 1,037,070 3,279,070 110,500 3,104,800 3,215,300 1 Values far 1975 are estimates
known as the Great Lakes Fishery Commission, and prescribed the Commission s duties. The Commission is composed of Canadian and United States sections, each served by four Commissioners appointed by their respective governments. A Secretariat, appointed by the Commission, assists the Commission in carrying out its duties. The Commission was charged with developing and coordinating fishery research programs, advising governments on measures to improve the fisheries, and developing and implementing measures to control the sea lamprey. The Convention specified that in the performance of its duties the Commission should, to the greatest extent possible, work through official agencies of the Contracting Parties and their States and the Province of Ontario. Consequently, the Commission relies on numerous individuals and groups from those agencies in the conduct of its business. The Commission s program is divided into two major segments: (1) sea lamprey control, and (2) coordination of fisheries research and management, FUNDING OF THE COMMISSION The Commission is funded through the Department of External Affairs 2 in Canada and by legislative appropriation to the Department of State in the United States. The cost of sea lamprey control and research is shared on a 69:31 ratio between the United States and Canada; cost of administration and general research is shared equally. The 69:31 ratio was established on the basis of average annual commercial catches of lake trout in the United States and Canada before the invasion of the sea lamprey into the Great Lakes. Table 1 lists requests, allotments, and expenditures of the Commission since its establishment. 2 Funds provided by the Department of the Environment.
To the present, nearly all Commission funds (Table 1) have been used in the sea lamprey control program, and it appears to be necessary to continue to commit such funds to maintain control. Additional funds will be required for work other than sea lamprey control. SEA LAMPREY CONTROL METHODS By the mid 1940 s, when fisheries agencies recognized the imperative need for a coordinated program to control the sea lamprey, this parasite had already severely damaged stocks of fish throughout the upper Great Lakes-especially the lake trout. Efforts to control the sea lamprey were initiated as early as 1948, following the establishment of a Great Lakes Sea Lamprey Committee composed of representatives from each of the Great Lakes states, the Province of Ontario, the U. S. Fish and Wildlife Service, and the Canadian Department of Fisheries. Control efforts between 1948 and 1955 were somewhat uncoordinated and experimental, partly because of the multiplicity of agencies involved and also because no assured source of funds was yet established. Initial control efforts were pursued mainly by the U. S. Fish and Wildlife Service in United States waters and by the Ontario Department of Lands and Forests in Canadian waters. During these early years much basic information required to plan and implement a control program was obtained. Important investigations being pursued at the time of the Commission s establishment included: life history and distribution of sea lampreys in the Great Lakes: development and testing of barriers in streams; and screening of chemicals in search of a toxicant that would selectively destroy sea lamprey larvae. These programs were continued, coordinated, and refined under Commission auspices after 1955. When the Commission assumed responsibility for the sea
Table 2. Numbers of streams and numbers of sea lamprey-producing streams tributary to the Great Lakes. Lake Province state Lake Superior Ontario Minnesota Wisconsin Michigan Subtotal Lake Michigan Michigan Wisconsin Illinois Indiana Subtotal Lake Huron Ontario Michigan Subtotal Lake St. Clair Ontario Michigan Subtotal Number of Number with Tributaries Sea lampreys 690 44 218 3 287 12 475 66 1,670 125 380 94 243 37 13 -- 6 3 666 110 1,318 49 674 59 1,992 108 23 22 45 1 -- 1 Figure 2. The sea lamprey s mouth is lined with horney teeth surrounding a rasping tongue. Figure 3. Chinook salmon with sea lamprey attached. (Photo courtesy of Michigan Department of Natural Resources.) Lake Erie Ontario Michigan Ohio Pennsylvania New York Subtotal 174 28 194 55 143 594 6 -- 3 2 1 12 Lake Ontario Ontario New York Subtotal 371 409 780 23 21 44 All Lakes Ontario All States TOTAL 2,576 3,171 5,747 123 277 400 5
Figure 4. Life cycle of the sea lamprey. lamprey control program in 1955, it entered into an ongoing contractual agreement with Federal agencies in the United States and Canada to carry out the operational program. In the United States the agent chosen was the U. S. Fish and Wildlife Service, and in Canada, Environment Canada s Fisheries and Marine Service. Both agencies had participated fully in the earlier investigations.
Figure 5. Mechanical weir (above) and electromechanical weir (below) used to capture sea lampreys.
When sea lamprey control was first undertaken, it was apparent that the most logical point of attack was when the animals were concentrated in tributary streams, either as adults on spawning runs or as larvae burrowed in the stream beds. Consequently, a survey of the streams entering the Great Lakes to ascertain which ones supported sea lamprey populations was essential. The survey was initiated in the late 1940 s, and since that time all tributaries entering the lakes have been checked (Table 2). In many streams suitable habitat was lacking, or the presence of physical barriers such as dams or falls prevented sea lampreys from reaching suitable habitat. Additional sea lamprey producing streams may yet be found, but the number will assuredly be very small. Initial efforts to reduce abundance of sea lampreys were carried out by means of mechanical or electromechanical barriers that were installed in sea lamprey producing streams. The barriers were designed to prevent mature sea lampreys from reaching spawning areas. The barrier program was initiated in the late 1940 s as a cooperative effort by the U. S. Fish and Wildlife Service and the states. Concurrently, the Ontario Department of Lands and Forests operated a small number of mechanical barriers in streams entering Lakes Huron and Superior; later (early 1950 s) mechanical and electromechanical barriers were operated under the sponsorship of a joint federal-provincial committee. After 1955 the program was continued under Commission auspices. At its peak in 1959, the program included about 135 barriers in the United States and Canada. The effectiveness of barriers as a control method was never adequately determined, but there is no doubt that barriers are effective in killing significant numbers of adult sea lampreys. On the other hand, it was recognized that as the main endeavor, the barrier program was fraught with problems. In 1958 the barrier program was discontinued as the major control method, after the initiation of chemical control. Thereafter, electrical barriers were continued in oper-
Figure 6. Adult sea lampreys captured at a barrier.
Table 3. Number of streams treated with lampricide, United States and Canada, 1958-74. 1 Lake Superior Michigan Huron Ontario Year U.S. Canada U.S. U.S. Canada U.S. Canada Total 1958 10 2 -- -- 12 1959 29 1960 15 1961 9 1962 19 1963 26 1964 25 1965 16 1966 5 1967 17 1968 2 1969 19 1970 10 1971 18 1972 24 1973 22 1974 18 TOTAL 284 9 -- 11 7 5 26 13 8 15 22 15 27 6 24 14 12 10 12 7 10 5 12 11 24 7 12 14 18 12 21 5 22 161 269 -- -- -- 1 2 -- -- -- 18 14 4 3 27 6 13 11 13 112 -- -- -- -- 7 -- 14 -- -- -- -- -- -- -- -- -- 10 -- 12 -- 11 -- 5 -- 11 -- 9 -- 14 20 14 7 9 -- 116 27 -- 38 -- 40 -- 55 -- 42 -- 63 -- 67 -- 46 -- 59 -- 65 -- 34 -- 44 -- 83 23 87 -- 103 3 90 5 72 31 1,000 10 'Through 1974 no treatments were carried out in Lake Erie, Lake St. Clair, or Finger Lake drainages. ation only as a means for measuring the abundance and biological characteristics of sea lampreys, Research into the feasibility of achieving control of sea lampreys with chemical toxicants was going forward during the development of the barrier network. During this period, some 6,000 chemicals were examined. Promising toxicants were field-tested in 1957 and 1958. These successful tests led the Commission, in 1958, to adopt toxicants as the major
Table 4. Numbers of mature sea lampreys captured at barriers on eight tributary rivers of Lake Superior, 1958.74. Two Year Betsey Hearted Sucker Chocolay Iron Silver Brule Amnicon Total 1958 1,071 3,418 1,727 6,168 401 2,111 22,593 7,584 45,073 1959 1,000 3,990 2,457 3,490 257 773 19,225 980 32,172 1960 686 4,222 4,670 4,167 310 1,261 9,523 1,081 25,920 1961 1,366 7,498 3,209 1962 316 1,757 474 1963 444 2,447 698 4,201 2,430 423 1,161 358 110 5,052 22,478 4,741 50,975 267 2,026 879 7,303 760 3,418 131 8,366 1964 272 1,425 386 445 178 593 6,718 232 10,249 1965 187 1,265 532 563 283 847 6,163 700 10,540 1966 65 878 223 260 491 1,010 226 938 4,091 1967 57 796 166 65 643 339 364 200 2,630 1968 78 2,132 658 122 82 1,032 2,657 148 6,909 1969 120 1,104 494 142 556 1,147 3,374 1,576 8,513 1970 a7 1,132 337 1971 104 1,035 485 1972 146 1,507 642 291 713 53 1,518 294 280 321 167 1,733 4,781 340 1,754 4,324 9,613 2,574 4,121 132 9,696 1973 294 894 468 270 16 495 261 149 2,847 1974 201 489 249 17 1 117 568 270 1,912 TOTAL 6,494 35,989 17,875 21,329 9,430 19,039 105,636 25,798 241,590 method of sea lamprey control. Over the years, two chemicals (3-trifluoromethyl-4-nitrophenol [TFM]) and (2, 5-dichloro-4 - nitrosalicylanilide [Bayer 731) have become established as the primary lampricides. Routine stream treatments are carried out with TFM or with TFM plus a small amount (1-4%) of Bayer 73. The addition of Bayer 73 reduces the amount of TFM required up to one half and thereby greatly reduces the cost of treatments. A granular form of Bayer 73 is also used
Figure 7. Over 6,000 chemicals were screened during the 7 years of intensive research preceding the discovery of TFM. in certain areas during treatment with TFM but this formulation of Bayer 73 is more frequently used as a survey tool. Methodology for application of the lampricides has been developed and refined over the years. At proper concentrations TFM destroys sea lamprey larvae without significantly affecting the other fauna or the flora. Sea lamprey control with lampricides was initiated in Lake Superior in 1958, expanded to Lake Michigan in 1960, to Lake Huron in 1966 3. and Lake Ontario in 1971. The first round 4 of treatments was completed in Lake Superior in 1961; in Lake Michigan in 1966; in Lake Huron in 1970; and in Lake Ontario in 1972. Not included in the accompanying summary of chemical treatments of streams in the 12 3 Chemical control was started in Lake Huron in 1960. It was discontinued in 1962-65 because of insufficient funds, and resumed in 1966. 4 A round denotes that all known sea lamprey producing streams tributary to that lake have received one chemical treatment.
Figure 8. Lampricides being pumped into a stream. United States and Canada in 1958-74 (Table 3) are several experimental treatments and certain retreatments made when the initial applications were ineffective for a variety of reasons. Thus, the total number of treatments since 1958 exceeds 1,000. Also excluded from the summary are about 160 applications of Bayer 73 in still-water areas within river systems and in areas off river mouths that are inhabited by larval sea lampreys. RESULTS OF SEA LAMPREY CONTROL Lampricides have been extremely effective in reducing the abundance of sea lampreys in -the Great Lakes. In Lake Superior, where the control program has been in operation for the greatest number of years and where its effectiveness has been most carefully evaluated, sea lamprey abundance has 13
Table 5. Salmonids planted in the Great Lakes, 1958-73. Lake and species Lake Superior Lake trout...,.......... 1958-73...... 34,380 Splake (Lake & brook trout)....... 1972-73....., la Coho Salmon.............. 1966-73...... 3,395 Chinook salmon............. 1967-73...... 1,516 Atlantic salmon........... 1972-73...... 40 Subtotal 39,349 Lake trout............ 1965-73...... 19,030 coho salmon............. 1966-73...... 18,308 Chinook salmon........... 1967-73...... 11,506 Atlantic salmon......... 1972-73...... Subtotal Lake trout............ 1973..... Splake................ 1969-73..... Backcross (Splake & lake trout)..... 1973...., Coho salmon............. 1968-73.... Chinook salmon............. 1968-73.... Atlantic salmon............ 1972.... Kokanee............... 1965-72..... Subtotal 629 1,827 486 2,964 3,548 9 13,035 1 22,498 Lake Erie Coho salmon.............. 1968-73..... 1,882 chinook salmon.............. 1970-73.... 1,194 Sl&ZXCIl 3,076 Lake Ontario Lake trout............... 1973...... 66 Splake..........,....... 1972-73...... a7 Coho salmon............... 1968-73..... 1,863 Chinook salmon............ 1969-73..... 1,762 Kokanee................ 1965-72..... g&2 Subtotal 9,900 TOTAL 123,692 Total by species Lake trout........ 54,105 Splake........... 1,932 Backcross......... 486 coho salmon........ 28,412 Chinook salmon... 19,526 Atlantic salmon.... 74 Kokanee........ 19,157s Total by Province or State Ontario... 29,744 Michigan.. 66,577 Wisconsin. 16,223 Minnesota.. 3,629 New York.. 2.943 Pennsylvania. 1,449 Indiana... 1,201 Illinois.. 964 Ohio.... 962 123,692 123,692 14 1 Includes 10.4 million fry and 1.7 million eggs 2 Includes 5.6 million fry and 0.3 million eggs 3 Includes 16.0 million fry and 2.0 million eggs
Figure 9. Sea lamprey catch from 8 streams tributary to Lake Superior. been reduced by about 90 percent. A quantitative measure of sea lamprey abundance has been obtained from counts of mature (spawning run) sea lampreys reaching index barriers in selected streams in Lake Superior. Initially such counts were made at 24 barriers (16 in the United States, 8 in Canada); later the number was reduced to 8 in the United States when it became apparent that the runs in these 8 streams would provide adequate information. On the basis of the catch of sea lampreys at these assessment barriers [Table 4], the numbers of mature sea lampreys in the spawning runs declined sharply in 1962, the year after the first round of stream treatments had been completed. The decrease in the magnitude of the spawning runs was accompanied by a marked decline in the incidence of fresh sea lamprey wounds on lake trout and later by an improved survival of lake trout to older age and large size. Equivalent quantitative data on sea lamprey control are not available for Lakes Huron 5 and Michigan, but the responses of sea lamprey and fish populations to control 5 Limited quantitative data are available from several barriers on the Canadian side of Lake Huron (in operation since the mid 1960 s and the Ocqueoc River in the United States; as in Lake Superior numbers of mature sea lampreys in the spawning runs have declined since the sea lamprey control program was initiated. 15
16
efforts have been similar to those in Lake Superior, and about the same degree of sea lamprey control has been achieved. In Lake Ontario, the sea lamprey control program has been in operation for only a brief time: nevertheless, experience in the other lakes suggests that control efforts will be effective. The Commission expects that a fully integrated sea lamprey control program will eventually include supplementary or alternative methods such as the construction of permanent barriers on selected streams and the use of biological controls such as chemosterilants. ENVIRONMENTAL CONSIDERATIONS In 1971 the Commission s sea lamprey program was broadened to include comprehensive studies of the immediate and Figure 10. A major sport fishery has become established in the Great Lakes area. (Photo courtesy of Michigan Dept. of Natural Resources.) 17
long-term effects of lampricides in the environment. Results to date suggest that the effects are very small, that the chemical control program can continue, and that registration of the lampricides by the Environmental Protection Agency will be forthcoming upon completion of the required studies. About $1.2 million were allocated to do this registration-oriented research in 1971-74. COOPERATIVE FISHERIES MANAGEMENT Along with its sea lamprey control program, the Commission has cooperated closely with fisheries agencies throughout the Figure 11. Michigan s Platte River is a popular spot for coho fishing. (Photo courtesy of Michigan Dept. of Natural Resources.) 18
Convention Area in the planning and implementation of programs to restore and enhance the depleted fish stocks. While the Commission has devoted particular attention to lake trout, the States and the Province of Ontario have pursued complementary programs. Large plantings of hatchery-reared salmonids constitute a major segment of the fisheries restoration program [Table 5). Sea lamprey control, large plantings of lake trout and other salmonids, and cooperative management programs have been accompanied by the resurgence of several of the indigenous species and the establishment of an outstanding sport fishery in the Great Lakes. Initially the Commission was obliged to concentrate on sea Figure 12. The commercial fishery is of international concern. (Photo courtesy of Michigan Department of Natural Resources.)
20 lamprey control and lake trout restoration, although from the first it was recognized that the effort to formulate a program to make possible the maximum sustained productivity of any stock of common concern was a major task. In recent years, with sea lamprey control and lake trout restoration having assumed operational status, the Commission has been able to devote more attention to other problems. Recognizing that ultimately the welfare of the Great Lakes fisheries resource depends upon maintaining an environment of the highest possible quality, the Commission, with the support of other fisheries agencies, is endeavoring, to develop closer liaison with those governmental agencies that have direct responsibility for water quality, pollution abatement, and land use. Through the years of its existence, the Commission has encouraged close cooperation among state, provincial, and federal fisheries agencies in the Great Lakes region-particularly those of the eight bordering states and the Province of Ontario, who have jurisdiction in their respective waters. Many, and probably most, of the fisheries problems are of concern to all agencies. Inasmuch as the development of integrated and mutually acceptable management programs, supported by adequate biological and statistical information, is vital to all agencies, the Commission has been pleased with the significant progress made in the past few years. The efforts of special interagency groups to summarize, evaluate, and recommend action toward the solution of particular problems have been especially noteworthy. The Commission recognizes that authority for regulation and management is vested in the eight states and the Province of Ontario. Thus, the Commision s most effective actions are to provide guidance, encourage cooperation and negotiation, establish a forum for discussion, disseminate information, and provide documentation. The Commission has found interagency work groups, either permanent or temporary, to be effective in the development and implementation of integrated and mutually acceptable management concepts.
Certain matters that are of particular concern to the Commission are briefly listed here. 1. 2. 3. 4. 5. 6. The development of a fully integrated sea lamprey control program to further reduce sea lamprey abundance. The program will include chemical and biological control methods along with electrical and mechanical barriers. Hatchery-reared lake trout planted in Lakes Superior and Michigan have not yet added substantially to the spawning lake trout population. In Lake Superior, limited recruitment is taking place in certain areas; in Lake Michigan natural reproduction of stocked lake trout has not been confirmed. The Commission supports efforts to accelerate natural reproduction of lake trout. Although sea lamprey control in Lake Ontario was started only recently (1971), certain problems have already appeared; for example, the Finger Lake system, especially the Oneida Lake drainage, may be contributing sea lampreys to Lake Ontario, and may have to be included in the control program. The Commission is concerned that agencies develop mutually compatible programs for fish restoration in Lake Ontario, as well as in the upper Great Lakes. Lake Erie streams have been surveyed for the presence of sea lampreys; about a dozen are potentially suitable for the production of sea lamprey ammocetes. It may, therefore, be necessary to add Lake Erie to the sea lamprey control program. Lake Committees have expressed grave concern over the lack of fisheries interest associated with the agencies responsible for water quality, pollution abatement, and land use. The Commission is continuing its effort to develop closer liaison with agencies such as the International Joint Commission to rectify this problem, 21
GREAT LAKES FISHERY COMMISSION TECHNICAL REPORT SERIES 22 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Use of 3-trifluoromethyl-4-nitrophenol as a selective sea lamprey larvicide, by Vernon C. Applegate, John H. Howell, James W. Moffett, B. G. H. Johnson, and Manning A. Smith. May 1961. Fishery statistical districts of the Great Lakes, by Stanford H. Smith, Howard J. Buettner, and Ralph Hile. September 1961. Commercial fish production in the Great Lakes 1867-1960, by Norman S. Baldwin and Robert W. Saalfeld. July 1962. Estimation of the brook and sea lamprey ammocete populations of three streams, by Bernard R. Smith and Alberton L. McLain. September 1962. A photoelectric amplifier as a dye detector, by Wesley J. Ebel. September 1962. Collection and analysis of commercial fishery statistics in the Great Lakes, by Ralph Hile. December 1962. Limnological survey of Lake Erie 1959 and 1960, by Alfred M. Beeton. November 1963. The use of alkalinity and conductivity measurements to estimate concentrations of 3-trifluoromethyl-4-nitrophenol required for treating lamprey streams, by Richard K. Kanayama. November 1962. Synergism of 5,2'-dichloro-4 -nitro-salicylanilide and 3-trifluoromethyl-4- nitrophenol in a selective lamprey larvicide, by John H. Howell, Everett L. King, Jr., Allen J. Smith, and Lee H. Hanson. May 1964. Detection and measurement of organic lampricide residues, by Stacy L. Daniels, Lloyd L. Kempe, Thomas J. Billy, and Alfred M. Beeton. 1965. Experimental control of sea lampreys with electricity on the south shore of Lake Superior, 1953-60, by Alberton L. McLain, Bernard R. Smith, and Harry H. Moore. 1965. The relation between molecular structure and biological activity among mononitrophenols containing halogens, by Vernon C. Applegate, B. G. H. Johnson, and Manning A. Smith. December 1966. Substituted nitrosalicylanilides: A new class of selectively toxic sea lamprey larvicides, by Roland J. Starkey and John H. Howell. December 1966. Physical limnology of Saginaw Bay, Lake Huron, by Alfred M. Beeton, Stanford H. Smith, and Frank F. Hooper. September 1967.
13. Population characteristics and physical condition of alewives, Alosa pseudoharengus, in a massive dieoff in Lake Michigan, 1967, by Edward H. Brown, Jr. December 1968. 14. Limnological survey of Lake Ontario, 1964 (five papers), by Herbert E. Allen, Jerry F. Reinwand, Roann E. Ogawa, Jarl K. Hiltunen, and LaRue Wells. April 1969. 15. The ecology and management of the walleye in western Lake Erie, by Henry A. Regier, Vernon C. Apple&ate, and Richard A. Ryder, in collaboration with Jerry V. Manz, Robert G. Ferguson, Harry D. Van Meter, and David R. Wolfert. May 1969. 16. Biology of larval sea lampreys (Petromyzon marinus) of the 1960 year class, isolated in the Big Garlic River, Michigan, 1960-65, by Patrick J. Manion and Alberton L. McLain. October 1971. 17. New parasite records for Lake Erie fish, by Alex 0. Dechtiar. April 1972. 18. Microbial degradation of the lamprey larvicide 3-trifluoromethyl-4- nitrophenol in sediment-water systems, by Lloyd L. Kempe. January 1973. 19. Lake Superior-A case history of the lake and its fisheries, by A, H. Lawrie and Jerold F. Rahrer. January 1973. 20. Lake Michigan-Man s effects on native fish stocks and other biota, by LaRue Wells and Alberton L. McLain. January 1973. 21. Lake Huron-The ecology of the fish community and man s effects on it, by A. H. Berst and G. R. Spangler. January 1973. 22. Effects of exploitation, environmental changes, and new species on the fish habitats and resources of Lake Erie, by W. L. Hartman. April 1973. 23. A review of the changes in the fish species composition of Lake Ontario, by W. J. Christie. January 1973. 24. Lake Opeongo-The ecology of the fish community and of man s effects on it, by N. V. Martin and F. E. J. Fry. March 1973. 25. Some impacts of man on Kootenay Lake and its salmonoids, by T. G. Northcote. April 1973. 26. Control of the sea lamprey (Petromyzon marinus) in Lake Superior, 1953-70, by Bernard R. Smith, J. James Tibbles and B. G. H. Johnson. March 1974. 27. Movement and recapture of parasitic-phase sea lampreys (Petromyzon marinus) tagged in the St. Marys River and Lakes Huron and Michigan, 1963-67, by Harry H. Moore, Frederich H. Dahl, and Aarne K. Lamsa. July 1974. 28. Changes in the lake trout population of southern Lake Superior in relation to the fishery, the sea lamprey, and stocking, 1950-70, by Richard L. Pycha and G. R. King. August 1975.